The 1/13 update clarifies a few things about bumpers. The important thing is the new figure 4-3 for [R27]:
Note that the corner on the right side, a little lower than center, that was marked "NOT OK" is now not marked. Apparently, that marking was just a mistake in the original, so it's okay.
Quote:
|
Question - does the 8" measurement of the bumper segment mean the plywood backing has to be 8" or is it the overall length, including the overlap with the adjacent side, which would be pool noodle and fabric. If it is the overall length, you could have a chassis opening of about 19" on a conventional chassis?
|
My interpretation is that the minimum length IN CONTACT WITH THE FRAME is 8", so that doesn't count any plywood extending past the vertex and overlapping with another piece of bumper plywood. Figure 4-4 in [R28] shows that the overlapping plywood is ok, and [R33] with the 1/17 updates says that "each end of the Bumper must be rigidly attached to the Frame Perimeter", so the part extending past the bumper won't count towards the 8". Since this last part is my interpretation, I sure would like to see an update that has dimensions inside the figures showing where this 8" is measured.